<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>改变背景颜色</title>
</head>
<body>
<button onclick="color('red')">设为红色</button>
<button onclick="color('yellow')">设为黄色</button>
<button onclick="color('blue')">设为蓝色</button>

<input type="color" onchange="color_diy(this)">
<script src="js/script.js"></script>
</body>
</html>